Grumpy Cat Kitten Photos Revealed (PHOTOS)

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Tardar Sauce aka Grumpy Cat aka the Internet’s most ill-tempered feline, isn't one to make a big deal of the past.

"I had a birthday once," reads a popular Grumpy Cat meme. "It was terrible."

But if her baby photos are any indication, it was also cute. This week, a tiny -- but still grumpy -- kitten's photo showed up on Facebook and Twitter, giving fans a glimpse into the past of their favorite viral hit.

Here's a full-grown Grumpy Cat as a comparison. Some things never change.